Summary. Hirose identifies ZH05-20DP-HU(A), HRS number CL0756-2204-0-00, as a black A-key, twenty-position plug housing in the ZH05 wire-to-board family. The official series catalogue also distinguishes the housing, separately sold retainer, male crimp contacts and board-side receptacles. This guide turns those records into a keying and harness-evidence workflow without approving a contact, wire, retainer, receptacle, tool, electrical load, stock position, price or application.
Preserve the complete identity
Use the EPPTC ZH05-20DP-HU(A) product record as the internal catalogue anchor. The Hirose ZH05-20DP-HU(A) product page confirms the exact part name and CL number. Keep the parentheses, suffix and HRS number in the BOM, enquiry, receiving record and document register. Do not reduce the identity to “ZH05 twenty-position housing,” because the series contains different position counts and mating keys.
Treat key A as configuration evidence
The Hirose ZH05 series catalogue lists this record as the black A-key plug. Key and colour support configuration control, but neither proves that an arbitrary ZH05 item is the correct mate. Record the proposed board-side receptacle by full Hirose number and verify its key, position count and interface in current documents. Keep B-key records separate even if other visible features appear similar.
Keep housing, retainer and contacts separate
The same catalogue states that the retainer is sold separately and lists male crimp contacts as distinct orderable records. Therefore, do not assume the plug housing includes a retainer or contacts. The harness BOM should identify each selected component, applicable wire construction, insulation diameter, crimp tooling and acceptance criteria. If a current application or harness instruction is unavailable, leave the process open instead of inferring strip length or crimp dimensions from an image.
Use the exact drawing for interface review
The official Hirose two-dimensional drawing for CL0756-2204-0-00 is the part-specific geometry source. Review the drawing revision, dimensions, orientation, key and referenced components before releasing the mating set. A family catalogue helps organize discovery, but the exact drawing and applicable process documents control the production configuration.
Build the harness evidence packet
- Record ZH05-20DP-HU(A) and CL0756-2204-0-00 without shortening.
- Identify the proposed receptacle, retainer and each contact by full Hirose number.
- Bind wire, strip, crimp and inspection criteria to current process documents.
- Define receiving checks for label identity, packaging traceability and visible damage.
- Keep current inventory, price and lead time outside the technical facts.
Receiving and change control
Incoming inspection should compare the complete label and packaging identity with the purchase record, then inspect only visible condition and features that current drawings make verifiable. Appearance cannot prove contact material, plating thickness, wire acceptance or electrical performance. If a supplier proposes a different key, position count, retainer, contact, packaging suffix or related-family record, reopen the evidence packet before changing the BOM or work instruction. Compare the exact drawings and process documents, preserve sample and correspondence traceability, record every unresolved difference and identify the responsible decision owner. A trial fit can support investigation, but it does not release a substitute or production crimp. Quarantine mixed or ambiguously labelled material until identity is resolved, and archive the reviewed source revisions with the final configuration.
Related navigation
Use the Hirose brand page, wire-to-board connector category and contact page to find separate catalogue records. These links do not establish fit or suitability.
FAQ and conclusion
Does the plug housing include the retainer and contacts?
Do not assume so. Hirose treats them as separate records; verify the commercial line items.
Can a B-key part replace this A-key housing?
No automatic substitution follows from the shared family name. Keying and the full interface must be reviewed.
Reliable use of ZH05-20DP-HU(A) starts with exact identity and keeps the receptacle, retainer, contacts, wire and tooling traceable to current first-party documents.
Manufacturer Sources
Author: Lianxinlian Electronics Product Information Team. Technical data quality review: Lianxinlian Electronics Technical Data Quality Team performs an automated source, language and internal-link completeness check; it is not an engineering approval or a product-suitability decision.